Patents by Inventor Kuniyuki Kitagawa
Kuniyuki Kitagawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20050002438Abstract: A method of measuring a temperature of an object body in an electric furnace, based on an intensity of a radiant energy emitted from the object body, the electric furnace being provided with an electric heater operable by application of a drive voltage thereto to heat the object body, the method comprising: a radiant-energy detecting step of detecting an intensity of a radiant energy emitted from the object body; a stray-light noise eliminating step of determining as a noise an intensity of a radiant energy of a stray light which is emitted from an inner wall surface of the electric furnace toward the object body and reflected by a surface of the object body, according to a predetermined relationship between the intensity of the radiant energy of the stray light and the drive voltage applied to the electric heater and based on an actually applied value of the drive voltage, and subtracting the intensity of the radiant energy of the stray light determined as the noise, from the detected intensity of the radianType: ApplicationFiled: August 4, 2004Publication date: January 6, 2005Applicants: NORITAKE CO., LIMITED, KUNIYUKI KITAGAWAInventors: Miyuki Hashimoto, Kenji Yano, Misao Iwata, Kuniyuki Kitagawa, Norio Arai, Satoshi Arai
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Patent number: 6817758Abstract: Method and apparatus for measuring a surface temperature of an object body, by calculating a temperature at each picture element of an image of the object body, on the basis of a radiant intensity ratio at each pair of corresponding picture elements of a first and a second image which are obtained with respective radiations having respective first and second wavelengths which are selected from a light emitted from the surface of the body, by a first filter which permits transmission therethrough a radiation having the first wavelength which is selected according to a radiant intensity curve corresponding to a wavelength of a black body at a lower limit of a temperature measurement range, and which is within a high radiant intensity range in which the radiant intensity is higher than a radiant intensity at a normal room temperature, and a second filter which permits transmission therethrough a radiation having the second wavelength which is selected within the high radiant intensity range, such that the secondType: GrantFiled: March 13, 2002Date of Patent: November 16, 2004Assignees: Noritake Co., LimitedInventors: Kenji Yano, Misao Iwata, Miyuki Hashimoto, Kuniyuki Kitagawa, Norio Arai
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Patent number: 6814484Abstract: Method and apparatus for measuring a surface temperature of an object body, by calculating a temperature at each picture element of an image of the object body, on the basis of a radiant intensity ratio at each pair of corresponding picture elements of a first and a second image which are obtained with respective radiations having respective first and second wavelengths which are selected from a light emitted from the surface of the body, by a first filter which permits transmission therethrough a radiation having the first wavelength which is selected according to a radiant-intensity curve corresponding to a wavelength of a black body at a lower limit of a temperature measurement range, and which is within a high radiant-intensity range in which the radiant intensity is higher than a radiant intensity at a normal room temperature, and a second filter which permits transmission therethrough a radiation having the second wavelength which is selected within the high radiant-intensity range, such that the secondType: GrantFiled: July 1, 2002Date of Patent: November 9, 2004Assignees: Noritake Co., LimitedInventors: Kenji Yano, Misao Iwata, Miyuki Hashimoto, Kuniyuki Kitagawa, Norio Arai
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Patent number: 6786634Abstract: A method of measuring a temperature of an object body in an electric furnace, based on an intensity of a radiant energy emitted from the object body, the electric furnace being provided with an electric heater operable by application of a drive voltage thereto to heat the object body, the method comprising: a radiant-energy detecting step of detecting an intensity of a radiant energy emitted from the object body; a stray-light noise eliminating step of determining as a noise an intensity of a radiant energy of a stray light which is emitted from an inner wall surface of the electric furnace toward the object body and reflected by a surface of the object body, according to a predetermined relationship between the intensity of the radiant energy of the stray light and the drive voltage applied to the electric heater and based on an actually applied value of the drive voltage, and subtracting the intensity of the radiant energy of the stray light determined as the noise, from the detected intensity of the radianType: GrantFiled: October 4, 2002Date of Patent: September 7, 2004Assignees: Noritake Co., Limited, Kuniyuki KitagawaInventors: Miyuki Hashimoto, Kenji Yano, Misao Iwata, Kuniyuki Kitagawa, Norio Arai
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Publication number: 20040008753Abstract: Method and apparatus for measuring a distribution of emissivity on a surface of an object body, on the basis of a light emitted from the surface of the object body, wherein a temperature of the object body at each picture element of its image is calculated on the basis of a radiant intensity ratio at each pair of corresponding picture elements of a first image and a second image which are obtained with respective two radiations of respective first and second wavelengths selected from the light emitted from the surface of the object body, to measure a distribution of the temperature on the surface of the object body, and an emissivity value at each picture element of the image of the object body is calculated on the basis of the measured distribution of the temperature, and according to a predetermined relationship between the temperature and the emissivity value.Type: ApplicationFiled: July 7, 2003Publication date: January 15, 2004Applicants: NORITAKE CO., LIMITED, Kuniyuki KitagawaInventors: Miyuki Hashimoto, Kenji Yano, Misao Iwata, Kuniyuki Kitagawa
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Publication number: 20040001525Abstract: Method and apparatus for measuring a surface temperature of an object body, by calculating a temperature at each picture element of an image of the object body, on the basis of a radiant intensity ratio at each pair of corresponding picture elements of a first and a second image which are obtained with respective radiations having respective first and second wavelengths which are selected from a light emitted from the surface of the body, by a first filter which permits transmission therethrough a radiation having the first wavelength which is selected according to a radiant-intensity curve corresponding to a wavelength of a black body at a lower limit of a temperature measurement range, and which is within a high radiant-intensity range in which the radiant intensity is higher than a radiant intensity at a normal room temperature, and a second filter which permits transmission therethrough a radiation having the second wavelength which is selected within the high radiant-intensity range, such that the secondType: ApplicationFiled: July 1, 2002Publication date: January 1, 2004Applicants: NORITAKE CO., LIMITED, Kuniyuki KITAGAWAInventors: Kenji Yano, Misao Iwata, Miyuki Hashimoto, Kuniyuki Kitagawa, Norio Arai, Satoshi Arai
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Publication number: 20030107724Abstract: Method and apparatus for measuring a surface temperature of an object body, by calculating a temperature at each local portion of an image of the object body, on the basis of a radiant intensity ratio at each pair of corresponding local portions of a first and a second image which are obtained by respective first and second photosensitive areas of an image detector, which detect respective radiations having respective first and second wavelengths selected from a light emitted from the surface of the body, wherein the image detector is constructed such that each pair of mutually corresponding two photosensitive elements in the respective first and second photosensitive areas, which corresponds to each pair of mutually corresponding two local portions of the first and second images, has a percentage of difference in light sensitivity of not higher than 0.25%.Type: ApplicationFiled: October 4, 2002Publication date: June 12, 2003Applicants: NORITAKE CO., LIMITED, Kuniyuki KITAGAWAInventors: Miyuki Hashimoto, Kenji Yano, Misao Iwata, Kuniyuki Kitagawa, Norio Arai, Satoshi Arai
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Publication number: 20030067956Abstract: A method of measuring a temperature of an object body in an electric furnace, based on an intensity of a radiant energy emitted from the object body, the electric furnace being provided with an electric heater operable by application of a drive voltage thereto to heat the object body, the method comprising: a radiant-energy detecting step of detecting an intensity of a radiant energy emitted from the object body; a stray-light noise eliminating step of determining as a noise an intensity of a radiant energy of a stray light which is emitted from an inner wall surface of the electric furnace toward the object body and reflected by a surface of the object body, according to a predetermined relationship between the intensity of the radiant energy of the stray light and the drive voltage applied to the electric heater and based on an actually applied value of the drive voltage, and subtracting the intensity of the radiant energy of the stray light determined as the noise, from the detected intensity of the radianType: ApplicationFiled: October 4, 2002Publication date: April 10, 2003Applicant: NORITAKE CO., LIMITEDInventors: Miyuki Hashimoto, Kenji Yano, Misao Iwata, Kuniyuki Kitagawa, Norio Arai, Satoshi Arai
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Publication number: 20020146056Abstract: Method and apparatus for measuring a surface temperature of an object body, by calculating a temperature at each picture element of an image of the object body, on the basis of a radiant intensity ratio at each pair of corresponding picture elements of a first and a second image which are obtained with respective radiations having respective first and second wavelengths which are selected from a light emitted from the surface of the body, by a first filter which permits transmission therethrough a radiation having the first wavelength which is selected according to a radiant intensity curve corresponding to a wavelength of a black body at a lower limit of a temperature measurement range, and which is within a high radiant intensity range in which the radiant intensity is higher than a radiant intensity at a normal room temperature, and a second filter which permits transmission therethrough a radiation having the second wavelength which is selected within the high radiant intensity range, such that the secondType: ApplicationFiled: March 13, 2002Publication date: October 10, 2002Applicant: NORITAKE CO., LIMITEDInventors: Kenji Yano, Misao Iwata, Miyuki Hashimoto, Kuniyuki Kitagawa, Norio Arai